Utilizing the exhaust of engines



" (No Model.) I D. RENSHAW.

UTILIZINGTHB EXHAUST 0P ENGINES. N0; 274,973. Patented Ap1.3,1883.

WITNESSES I t 1 EJVTOR UNITED. STATES PATENT OFFICE.

DAVID RENSHAW, OF BRAINTREE, MASSACHUSETTS.

"UTILIZING THE EXHAUST OF ENGINES.

SPEGIFICATION.formingpart of Letters Patent No. 274,973, dated April 3, 18 83.

Application filed February 24, 1883. (No model.)

'1' 0 all whom it may concern Be it known that I, DAVID RENSHAW, of Braintree, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in the Methods of Utilizing the Exhaust of Engines; and I do hereby declare that the tollowing is a full,

clear, and exact description of the invention,

which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawing, and to the letters of reference marked thereon, which form part of this specification.

The object of this invention is the utilization of the exhaust of engines; and it consists in the process herein described of taking steam from the boiler and superheating the same, and then delivering it to an injector, where it comes in contact with the exhaust of the engine, and also with water taken from said boiler,

.the united effect of the mixture in an injector being the return of the whole to the boiler from which they were taken. This water maybe forced by the boiler-pressure to a tank located above the line of the injector, and fed to it by gravity under ordinary atmospheric pressure; or it may be forced through a cooling apparatus and delivered to the injector at boilerpressure, but cooled; or it may be forced directly from the boiler-into the injector without such cooling, as may be desired.

The drawing shows a side elevationof an arrangement for carrying this process into cffeet, in which are shown different means in de livering the water to the injector, as described.

Referring more particularly to said drawing, A is the working-boiler; B, the engine; 0, the superheater, which receives its supply from the boiler A through pipe a. D is an injector, which receivesits driving or working steam from the superheater G through pipe 0, and also the exhaust of the engine through the exhaust-pipe I). The water delivered from the boiler A to the injector D through pipe yfor the purpose of efl'ecting partial condensation may first pass from said boiler through pipes d d to tank E, and from tank E through pipe (1 to injector D, under atmospheric-pressure5 or itmay pass from the boiler A through pipes d (1 through cooling-coil H, (located in tank J.,) and thence through pipes h and 3 into the inject-or D, partially cooled, but under the pressure of the working-boilerA; or it may pass directly from the boiler A through pipes d, h,

l and 3 into the injector at the pressure and temperature due to the working-boiler A. All

the connecting-pipes are controlled by suitable valves and suitable furnaces, as provided for the boiler and super-heater.

The superheater, ranks, and boiler, and their connections may be of any ordinary construction. The engine B is supplied with boiler-stea|n through pipef.

Havingdescribed my invention, whatl claim as new, and desire to secure by Letters Patent, 1s-

1. The process herein described of utilizing the exhaust of engines by first taking live steam from the boiler, then superheating it, then bringing it in contact, in an injector, with the exhaust-steam from the engine and with water taken from the said boiler and cooled, thus returning it into the boiler from which it came, on the principle of the injector.

2. The process herein described of utilizing the exhaust of engines by first taking live steam from the boiler, then superheating it, then bringing it in contact, in an injector, with the exhaust-steam from the engine and with water taken from the said boiler, without cooling, thereby returning it into the ooiler from which it came, on the principle of the injector.

3. In an apparatus for utilizing the exhaust of engines, the combination of the boiler, the superheater, the injector, and the cooling me-' dium with the live-steam and water pipes from the boiler, and with the exhaust-pipe, the live and exhaust steam and water being mixed in the injector and returned into the boilor from which they were taken, as described.

4. In an apparatus forutili-zing the exhaust of engines, the combination of the boiler, the live-steam superheater, the injector, the exhaust-pipe, the live-steam pipe, and the waterpipe connecting directly with the boiler, the whole uniting in the said injector, whereby the exhaust-steam is returned into the boiler from which it came by the superheated steam, and the water from the boiler without cooling the boiler-water, as described.

In testimony that I claim the foregoing as my own invention I afiix my signature in pres ence of two witnesses.

DAVID RENSHAW.

Witnesses:

B. F. MORSELL,

too 

